CN102035362B - Distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer - Google Patents
Distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer Download PDFInfo
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- CN102035362B CN102035362B CN 201010550812 CN201010550812A CN102035362B CN 102035362 B CN102035362 B CN 102035362B CN 201010550812 CN201010550812 CN 201010550812 CN 201010550812 A CN201010550812 A CN 201010550812A CN 102035362 B CN102035362 B CN 102035362B
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Abstract
The invention discloses a distribution capacitance energy-storing absorber of a high-power direct current high-voltage isolating transformer, comprising an isolating transformer and an isolated transformer, wherein a secondary side of the isolating transformer is connected with a primary side of the isolated transformer through a lead; the isolating transformer and the isolated transformer are positioned at the same potential and symmetrically provided with distributed capacitors to the ground; a secondary side of the isolated transformer is connected with a power supply module; a specific point having the same voltage to the ground as a neutral point of the primary side of the isolated transformer is arranged at the output end of the power supply module; and a resistor is in series connected between the specific point and the neutral point at the primary side of the isolating transformer and forms the distribution capacitance energy-storing absorber when the power supply module is short-circuited. The invention has the advantages of low cost and low requirement on the space, is simple, reliable and is convenient for installation; when the load is short-circuited, the stored energy of a distributed capacitor inside the high-power direct current high-voltage isolating transformer can be directly absorbed by a non-inductive capacitor so as to improve the safety of the load when being short-circuited.
Description
Technical field
The present invention relates to a kind of distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer.
Background technology
In high power DC high-voltage power supply device, for the purpose of potential isolation, need the high direct voltage isolating transformer to provide the electric energy of isolation to supply with, its secondary connects a high-power transformer that is isolated current potential.Have dc high voltage like this between the former secondary of high direct voltage isolating transformer, owing to have distributed capacitance between inner each parts of transformer, particularly secondary has larger distributed capacitance to former limit with between the shell; When isolating transformer moved, these distributed capacitance had electrical power storage, and when the load device of transformer-supplied during in short circuit, the energy storage of transformer distributed capacitance will discharge by load.At the auxiliary heating system of plasma basis research field, some load, such as intensifying ring and klystron, they require power-supply system to only have a joule magnitude to the energy of its injection, if the too many load of Implantation Energy will damage when short circuit.Because load is expensive, so just require the absorption plant of distributed capacitance energy storage.General absorption plant is to add energy absorbing device at load end at present, and this energy absorbing device is too heavy, and cost is high, and difficulty is installed, and storing up absorbent device for high direct voltage isolating transformer distributed capacitance does not still have literature research.
Summary of the invention
The purpose of this invention is to provide a kind of simple and reliable energy absorbing device, particularly directly absorb the inner distributed capacitance energy storage of high power DC high voltage isolating transformer; Make it not discharge the fail safe when loading on short circuit with increase to load.
Technical scheme of the present invention is as follows:
A kind of distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer, include isolating transformer and be isolated transformer, it is characterized in that: the secondary of described isolating transformer links to each other by wire with the described former limit that is isolated transformer, and described isolating transformer is on the identical current potential and has respectively over the ground distributed capacitance with the described transformer that is isolated; The described secondary that is isolated transformer is connected to power module, the output of described power module is provided with the specified point that equates with the described voltage to earth that is isolated the neutral point of transformer primary side, be serially connected with resistance between the neutral point on described specified point and the former limit of isolating transformer, described resistance consists of distributed capacitance energy storage absorber when described power module is short-circuited.
Described distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer is characterized in that: described resistance is noninductive resistance.
Described distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer is characterized in that: described resistance is noninductive resistance.
Beneficial effect of the present invention:
The present invention utilizes noninductive resistance as transformer inside distributed capacitance energy storage absorber, simple and reliable, cost is low, easy for installation, space requirement is little; When load was short-circuited, noninductive resistance directly absorbed the energy storage of the inner distributed capacitance of high power DC high voltage isolating transformer, made it not discharge to load, had increased the fail safe when loading on short circuit.
Description of drawings
Fig. 1 is the structure chart of high power DC high voltage source of the present invention.
Fig. 2 is the discharge loop schematic diagram of transformer distributed capacitance when load short circuits.
Embodiment
Referring to Fig. 1, a kind of distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer, include isolating transformer T1, T2 and be isolated transformer T3, T4, T5, T6, the secondary of isolating transformer T1 links to each other by wire with the former limit that is isolated transformer T3, T4, the secondary of isolating transformer T2 links to each other by wire with the former limit that is isolated transformer T5, T6, and isolating transformer T1, T2 be isolated transformer T3, T4, T5, T6 and be on the identical current potential and have respectively over the ground distributed capacitance;
The secondary that is isolated transformer T3, T4, T5, T6 is connected to respectively power module, the output of power module is respectively equipped with the specified point that equates with the voltage to earth of the neutral point that is isolated transformer T3, T4, T5, the former limit of T6, be serially connected with respectively noninductive resistance between the neutral point on specified point and isolating transformer T3, T4, T5, the former limit of T6, noninductive resistance consists of respectively distributed capacitance energy storage absorber when power module is short-circuited.
The maximum output voltage of the DC high-voltage power supply of this kind structure surpasses 100kV, and the inside distributed capacitance energy storage of isolating transformer T1 and T2 can absorb by the former limit neutral point that is isolated transformer T3, T4, T5 and the T6 noninductive resistance of connecting with the power module outlet among.
Every is isolated the secondary of transformer and connects the power module selection and can decide according to actual requirement of engineering, and separate unit is isolated any one secondary winding of transformer and the power module of connection can be connected by noninductive resistance by the former limit of noninductive resistance and its neutral point.The output that selection is isolated that secondary winding of centre of transformer and connected power module be isolated the connect noninductive resistance in 100 Europe of transformer primary side neutral point, actual measurement resistor current peak value reaches hundred order of amps, resistance parameter is 100 Europe, power 300W.
The present invention is further illustrated below in conjunction with specific works principle of the present invention:
Referring to Fig. 2, C is the inner total Equivalent Distributed electric capacity sum of transformer, R be transformer neutral point with the power module specified point between the resistance of connecting, Rload is load, K is load short circuits analog switch (load short circuits when K is closed), the connected transformer primary side that is isolated current potential of isolating transformer secondary, they are on the identical current potential, and very large distributed capacitance is arranged over the ground; The neutral point that is isolated transformer primary side is connected by noninductive resistance with the inner specified point of power-supply system.The selection of specified point is as follows: when the power supply steady operation, the voltage to earth of this point equates with the voltage to earth that is isolated the transformer primary side neutral point.When load short circuits, the inner distributed capacitance energy storage of transformer discharges to load by this resistance, and the terminal voltage during load short circuits is approximately zero, and is also closed with regard to K, the load-side short circuit.Line resistance in the major loop is very little with respect to this resistance, and in the side circuit, line resistance is much smaller than 1 ohm, and series resistance R is hundred ohm of magnitudes, and resistance R is as transformer distributed capacitance energy storage absorber.Most energy storage of distributed capacitance are absorbed by resistance R, and the energy that is discharged in the load is just very little, thereby have protected the safety when loading on short circuit.
When power-supply system worked, transformer neutral point did not have too large voltage fluctuation, so the resistance of connecting on the neutral point is very little in power supply run duration power consumption; If power supply is the DC Steady operation, then this ohmically power consumption is approximately zero; The volume of resistance can be selected very little, only considers that the transient energy when load short circuits discharges.The peak current that resistance bears is that short circuit distributed capacitance voltage to earth constantly is divided by resistance value; Can calculate peak current according to actual device, then determine the design parameter of noninductive resistance.
Claims (1)
1. distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer, include isolating transformer and be isolated transformer, it is characterized in that: the secondary of described isolating transformer links to each other by wire with the described former limit that is isolated transformer, and described isolating transformer is on the identical current potential and has respectively over the ground distributed capacitance with the described transformer that is isolated; The described secondary that is isolated transformer is connected to power module, the output of described power module is provided with the specified point that equates with the described voltage to earth that is isolated the neutral point of transformer primary side, described specified point and be isolated between the neutral point of transformer primary side and be serially connected with noninductive resistance, described noninductive resistance consists of distributed capacitance energy storage absorber when described power module is short-circuited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010550812 CN102035362B (en) | 2010-11-19 | 2010-11-19 | Distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010550812 CN102035362B (en) | 2010-11-19 | 2010-11-19 | Distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer |
Publications (2)
| Publication Number | Publication Date |
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| CN102035362A CN102035362A (en) | 2011-04-27 |
| CN102035362B true CN102035362B (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010550812 Expired - Fee Related CN102035362B (en) | 2010-11-19 | 2010-11-19 | Distribution capacitance energy-storing absorber of high-power direct current high-voltage isolating transformer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103487159B (en) * | 2013-09-24 | 2016-01-06 | 南京国电南自美卓控制系统有限公司 | During temperature sensor long range measurements on circuit distributed capacitance slacken method |
| CN107241025A (en) * | 2017-07-17 | 2017-10-10 | 华中科技大学 | A kind of high voltage power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB161955A (en) * | 1920-04-16 | 1921-12-08 | Asea Ab | Improvements in the arrangement of neutral point resistances for electric high tension transmission systems |
| US1654949A (en) * | 1923-01-05 | 1928-01-03 | Toulon Pierre Marie Gabriel | Current-regulating arrangement for rectifiers |
| CN1578094A (en) * | 2003-07-11 | 2005-02-09 | 株式会社日立制作所 | Electric power changing device |
| CN101055989A (en) * | 2007-03-09 | 2007-10-17 | 张云一 | Virtual grounding power transmission and distribution system |
-
2010
- 2010-11-19 CN CN 201010550812 patent/CN102035362B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB161955A (en) * | 1920-04-16 | 1921-12-08 | Asea Ab | Improvements in the arrangement of neutral point resistances for electric high tension transmission systems |
| US1654949A (en) * | 1923-01-05 | 1928-01-03 | Toulon Pierre Marie Gabriel | Current-regulating arrangement for rectifiers |
| CN1578094A (en) * | 2003-07-11 | 2005-02-09 | 株式会社日立制作所 | Electric power changing device |
| CN101055989A (en) * | 2007-03-09 | 2007-10-17 | 张云一 | Virtual grounding power transmission and distribution system |
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| CN102035362A (en) | 2011-04-27 |
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Granted publication date: 20130220 Termination date: 20131119 |